California Smog Check Inspector Practice Test

What action must a technician take regarding the catalyst if it was installed after the rescission date?

1. Record it as pass (P)

2. Record it as modified (M)

3. Record it as tamper (T)

4. Ignore it

The correct answer is: Record it as tamper (T)

When a technician encounters a catalytic converter that was installed after the rescission date, it is essential to mark it as tampered. This designation is significant because the regulatory framework governing smog checks stipulates that any emissions-related component, such as a catalytic converter, must meet specific criteria based on the vehicle's model year and emissions standards. If a catalyst is installed after the rescission date, it is considered not compliant with the existing regulations. This is because vehicles are required to operate with components that adhere to the original equipment specifications unless they meet the allowable modifications. Recording the catalytic converter as tampered indicates a deviation from compliance and alerts future inspectors or regulatory entities to the potential emissions impact. By marking it as tampered, the technician acknowledges that this could lead to higher emissions, which is critical for maintaining adherence to California's strict air quality standards. This reinforces the importance of using only approved parts that align with the vehicle’s emissions certification.